Twister spool or bobbin



i Z, l uuuluu mum 4. L7 July 28, 1936. I H. D. CLINTON 2,043,996

TWISTER SPOOL OR BOBBIN Filed Oct. 4, 1935 Ham? Y D. CL/N TON Patented July 28, 1936 UNITED STATES PATENT OFFICE 8 Claims.

This invention relates to spools and bobbins, with reference more particularly to twister members or devices of this article class.

The object of the invention is to provide an improved spool, or attachment therefor, designed for engagement upon a twister spindle for rotatably driving the same in loading and other operations in a textile mill.

Spools and bobbins heretofore used as "twister elements have been either of the clumsy thickhead type employing heavy wear plates on the outer face, or of the lighter extended-axis type requiring metal caps or liners to protect the driving or twister slot. Neither of these types has been really satisfactory, due to the excessive weight and to the excessive wear which they engender. Various expedients have been adopted to improve them and their enduring qualities, but these have not been particularly successful and have usually added considerable expense, besides complicating their construction more than the necessities should require.

It is the aim of this invention to provide a properly light, substantial and long-wearing spool or bobbin for twister use, which will be simple in character and inexpensive to produce, being little if any more costly than the ordinary spool or bobbin unadapted to such function. More specifically, its purpose is to provide a simple attachment for the ordinary spool, which will render it capable of this special use without other change.

These and other advantages, in addition to further objects and the general concept of the invention, will be apparent from the following description, with reference to an illustrative embodiment thereof in the form of a spool shown in the attached drawing.

In said drawing:

Fig. 1 is a fragmentary perspective view of the improved twister-spool, including the representation of a twister spindle upon which it is to pp y;

Fig. 2 is a fragmentary side elevational view of the spool, with the twister-end part shown in diametrical cross-section longitudinally of the twister slot;

Fig. 3 is a top plan view of said twister-end part;

Fig. 4 is a diametrical cross-section thereof across the twister slot, on the line 4-4 of the preceding view; and

Fig. 5 is a bottom or plan view of said part inverted.

The illustrative spool includes an ordinary barre] 6, composed of wood or other material adapted to the purpose, such as composition, steel or even glass. This is preferably hollowed by an axial bore for suitable lightness and may actually be of a very thin wall structure sufficient merely to give it the necessary strength.

On each end of the barrel, or in some cases only on one end, is an ordinary disc head 1, composed preferably of hard vulcanized fibre, although other material, such as wood, bakelite or steel may be used. Said head may be attached to the barrel in any number of diflerent ways found to be satisfactory, as by a hard wood fastening plug fitted through a central opening of the head into a counter-bore of the barrel. However, it is preferably attached by such a plug, indicated at 8, in conjunction with a metal bushing or locking ring engaging over the edge of the opening in the head and under a shoulder of the plug--as described in my prior Patent No.

1,987,991 dated January 15, 1935-for greater security in fastening and preventing slippage on the barrel. This head is of a thickness less than that of the usual twister spool head, required to give it the proper set up or lift on the twister spindle.

Upon the outer face of one of the heads, a

metal plate 9 of dish form or shape is applied in inverted relation, that is, with its hollow (concave) side toward the head. This plate is of U a depth or axial thickness adding to the aforesaid disc or head (1), the necessary thickness or height of a twister head which it forms jointly therewith. That is to say, said plate and disc together form the twister head of the spool.

The aforesaid plate is firmly secured to the disc head by suitable means such as the rivets l0 shown, passed through orifices ll provided in its rim flange 9 resting upon the head. A washer (not shown) may, if desired, be placed under this flange, but the same is not considered necessary and would require a reduction in the axial thickness of the plate in order to compensate for the extra thickness which it would add.

The raised flat surface portion 9 of the plate has a combined center-bore and diametric slot opening I! therein, adapted to fit over the shank and driving lug of a twister spindle. Said opening is formed by perforating the plate so as to leave portions of said surface (9 which are bent inward around the edge of the opening to provide side walls 8 therefor and to bear edgewise, at several points at least, upon the disc head therebelow so as to strengthen and rigidify the top surface. Consequently, the plate surface cannot be depressed or dented from dropping or striking blows received in handling or tossing about in the mill.

The spool thus formed is applicable to the twister spindle, represented at l3, by slipping over the shank which is extendible into its barrel and turning sufficiently to engage the slot (I2) of the plate with the driving lug 13' of the same. The depth or axial thickness of said plate added to that of the disc head, gives the necessary height or set up to the jointly formed twister head. For instance, if the disc is inch thick and the thickness of the twister head must be inch, the plate is made 4 inch in axial thickness so that the two combined will make an overall thickness of just an inch. The described plate as an attachment accordingly serves to adapt any ordinary spool or bobbin to the special function and use of a twister element and its advantages from this as well as the economic standpoint will be apparent.

If desired, this twister-head plate may be formed as part of a yarn tail-end holder and fastening member on the outer end or outer face of the head of the spool, as described in my copending application executed and filed of even date herewith, and either together with said member, or alone, it may be formed as part of the head locking ring described in said application. However, its herein described form will generally be preferred because of the greater simplicity.

It will be obvious that various changes in form and arrangement may be made and that various combinations and sub-combinations may be employed to adapt the invention to different spool and bobbin constructions, according to requirements, without departing from the spirit and scope of the invention. Therefore, it is not intended that the appended claims shall limit the same to the particular form or construction herein illustrated and described.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a twister spool or bobbin, including a barrel with a disc-like head on the end, a metal plate member forming a part of the head and providing a slot for engaging with the driving lug of a twister spindle; said plate member comprising a thin wall material in the shape of a dish, having its central portion spaced from the head and a relatively narrow peripheral portion faced upon the head along and adjacent to the edge thereof so as with said central portion to substantially over-extend the outer surface of said head proper, and the central portion being recessed diametrically with edges turned inwardly so as to fit the lug of the spindle to which the spool is to be applied.

2. In a twister head of a spool or bobbin, including a barrel body, a disc on the end of the barrel and a metal plate member on the face of the disc together forming the head; said member being of a hollow thin wall structure inverted with respect to the disc upon which it bears with a narrow peripheral contact adjacent the disc edge and its central portion substantially overextending said disc and forming the slot to engage the driving lug of a twister spindle by means of a diametric opening in said central portion having the edges turned inward in perpendicular relation to the disc surface.

3. In a spool or bobbin, a barrel having a twister head comprising a disc fastened to an end of the barrel, and a metal plate of dish-like form secured in inverted relation to the face of the disc and substantially overextending the outer surface thereof; the depth or thickness of the plate added to that of the disc giving the desired width or height to the head, and said plate having a central slot formed to fit the driving lug of a twister spindle, with the edges of said slot turned inwardly perpendicular to the surface of said disc.

4. In a spool or bobbin, 9. barrel having a twister head comprising a fiat disc fastened to an end of the barrel, and a metal plate of dish form secured in inverted relation upon the face of the disc; the depth or axial thickness of the plate added to the thickness of the disc giving the desired width or height to the head, and said plate having a central slot formed to fit the driving lug of a twister spindle with sides of the slot provided by portions of its surface turned in to bear upon the surface of the disc.

5. In a spool or bobbin, a twister head comprising a disc fastened to an end of the body or barrel thereof, and a thin metal plate of dish form secured hollow side inward upon the face of the disc; the axial thickness of the plate added to that of the disc giving the desired thickness to the head formed jointly thereby, and said plate having a central slot formed to fit the driving lug of a twister spindle, with portions of its surface opened to form said slot turned inward to bear upon the disc and provide sides to the slot.

6. A spool or bobbin, including a barrel with a disc head having a twister head attachment, comprising a thin metal plate of dish form secured in inverted relation upon the face of the head; said plate being of a depth or overall thickness to add the necessary width or height to the head, and having a central slot formed to fit the driving lug of a twister spindle extendible therethrough into the bore of the barrel, portions of the plate surface opened to form said slot being turned inward to provide sides therefor and bear upon the head so as to rigidify and strengthen such surface.

7. A spool or bobbin, including a barrel with a disc head at its end, having a twister-head attachment, comprising a thinmetal plate of dish form secured in inverted relation upon the outer face of the head; said plate being of a depth to add the desired overall thickness to the head and having a central bore and slot formed to fit the driving lug of a twister spindle extendible into the bore of the barrel, portions of the plate surface opened to form said bore and slot being turned inward to provide sides therefor and bear upon the head so as to rigidify and strengthen such surface.

8. A twister head attachment for spools or bobbins, comprising a thin metal plate of dish form adapted to be secured in inverted relation upon the outer surface of the ordinary head on the end oi. a barrel, said plate being of a depth to add the required thickness to the head and having a central bore and diametric slot formed to fit the driving lug of a twister spindle, portions of the plate surface cut to form said bore and slot being turned inward to provide sides therefor and bear upon the head so as to rigidify and' strengthen such surface against depression.

HARRY D. CLINTON. 

